California Code, Health and Safety Code - HSC § 117647

(a) If the material that the tubing, container, or inner liner held is pourable, no material can be poured or drained from the tubing, container, or inner liner when held in any orientation, including, but not limited to, when tilted or inverted.

(b) If the material that the container or inner liner held is not pourable, no material or waste remains in the container or inner liner that can feasibly be removed by scraping.